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1、基于基于 51 单片机的单片机的 lcd 1602 液晶显示的计算器液晶显示的计算器/* 阿斌独家制作:计算器，1602 液晶显示 可计算 10 以下数加减乘除 可连续运算，最大显示结果数值 65536 */键盘设置：键盘设置：液晶初始显示：液晶初始显示：运算显示：运算显示：主程序：主程序：#include #include #define uint unsigned int #define uchar unsigned char sbit lcden=P22; sbit lcdrw=P21; sbit lcdrs=P20; uchar num,temp,jia=0,jian=0,cheng=
2、0,chu=0,qing=0; uint key,key1,shu; uchar fuhao,flag1,flag=0; uchar table= 0x3f,0x06,0x5b,0x4f, 0x66,0x6d,0x7d,0x07, 0x7f,0x6f,0x0; void delay(uint z) uint x,y; for(x=z;x0;x-) for(y=110;y0;y-); bit lcd_bz() bit result; lcdrs=0; lcdrw=1;lcden=1; _nop_(); _nop_(); _nop_(); _nop_(); result=(bit)(P0 lcde
3、n=0; return result; void write_com(uchar com) while(lcd_bz(); lcdrs=0; lcden=0; lcdrw=0; P0=com; delay(5); lcden=1; delay(5); lcden=0; void write_date(uchar date) while(lcd_bz(); lcdrs=1; lcden=0; lcdrw=0; P0=date; delay(5); lcden=1; delay(5); lcden=0; void lcd_init() lcden=0; write_com(0x38); write
4、_com(0x0c); write_com(0x06); write_com(0x01); void keyscan() P3=0xfe;temp=P3; temp=temp while(temp!=0xf0) delay(5); temp=P3; temp=temp while(temp!=0xf0) temp=P3; switch(temp) case 0xee:key=1;num=0;break; case 0xde:key=2;num=0;break; case 0xbe:key=3;num=0;break; case 0x7e:num=1;break;/加号 while(temp!=
5、0xf0) temp=P3; temp=temp P3=0xfd; temp=P3; temp=temp while(temp!=0xf0) delay(5); temp=P3; temp=temp while(temp!=0xf0) temp=P3; switch(temp) case 0xed:key=4;num=0;break; case 0xdd:key=5;num=0;break; case 0xbd:key=6;num=0;break; case 0x7d:num=2;break;/减号 while(temp!=0xf0) temp=P3; temp=temp P3=0xfb; t
6、emp=P3; temp=temp while(temp!=0xf0) delay(5); temp=P3; temp=temp while(temp!=0xf0) temp=P3; switch(temp) case 0xeb:key=7;num=0;break; case 0xdb:key=8;num=0;break; case 0xbb:key=9;num=0;break; case 0x7b:num=3;break;/乘号 while(temp!=0xf0) temp=P3; temp=temp P3=0xf7; temp=P3; temp=temp while(temp!=0xf0)
7、 delay(5); temp=P3; temp=temp while(temp!=0xf0) temp=P3; switch(temp) case 0xe7:key=0;num=0;break;case 0xd7:num=6;break;/清除 case 0xb7:num=5;break;/等于号 case 0x77:num=4;break;/除号 while(temp!=0xf0) temp=P3; temp=temp void display0(uint shu) uint ge; ge=shu; write_date(0x30+ge); void display1(uint shu)
8、uint shi,ge; shi=shu/10; ge=shu%10; write_date(0x30+shi); write_date(0x30+ge); void display2(uint shu) uint bai,shi,ge; bai=shu/100; shi=shu%100/10; ge=shu%10; write_date(0x30+bai); write_date(0x30+shi); write_date(0x30+ge); void display3(uint shu) uint qian,bai,shi,ge; qian=shu/1000; bai=shu%1000/1
9、00; shi=shu%100/10; ge=shu%10; write_date(0x30+qian);write_date(0x30+bai); write_date(0x30+shi); write_date(0x30+ge); void display4(uint shu) uint wan,qian,bai,shi,ge; wan=shu/10000; qian=shu%10000/1000; bai=shu%1000/100; shi=shu%100/10; ge=shu%10; write_date(0x30+wan); write_date(0x30+qian); write_
10、date(0x30+bai); write_date(0x30+shi); write_date(0x30+ge); void display_key1(uint result) if(flag1=1) write_com(0x01); flag1=0; shu=result; write_com(0x80); if(result=10 void dis_key(result) if(result=10 void display_key(uint result) if(shu=10 dis_key(result); void display_fuhao() switch(fuhao) case
11、 1: write_date(0x2b);break; case 2: write_date(0x2d);break; case 3: write_date(0x2a);break; case 4: write_date(0x2f);break; fuhao=0; void fuhao_pan() if(flag1=1) flag1=0; write_com(0x01); write_com(0x80+1); display_fuhao(); if(shu=10 display_fuhao(); flag=1; void fuhao_deng() write_com(0x80+0x40); w
12、rite_date(0x3d); flag1=1; flag=0; void display_result(uint result) write_com(0x80+0x40+1); if(result=10 void jia1() jia=1; jian=cheng=chu=qing=0; key1=key; fuhao=1; fuhao_pan(); void jian1() jian=1; jia=cheng=chu=qing=0; key1=key; fuhao=2; fuhao_pan(); void cheng1() cheng=1; jia=jian=chu=qing=0; key
13、1=key; fuhao=3; fuhao_pan(); void chu1() chu=1; jia=jian=cheng=qing=0; key1=key; fuhao=4; fuhao_pan(); void qing1() qing=1; jia=jian=cheng=chu=0; key1=key=0; void deng1() if(jia) key=key1+key; if(jian)key=key1-key; if(cheng) key=key1*key; if(chu) key=key1/key; fuhao_deng(); display_result(key); jia=
14、jian=cheng=chu=qing=0; void deal() switch(num) case 0: switch(flag) case 0: display_key1(key);break; case 1: display_key(key);break; break; case 1: jia1();break; case 2: jian1();break; case 3: cheng1();break; case 4: chu1();break; case 5: deng1();break; case 6: qing1();break; void main() lcd_init(); while(1) keyscan(); deal();
